1. Create pull request.
2. Rename remote branch using
```bash
$ git push origin :fealure/CPT-270-old_name feature/CPT-270-new_name
Total 0 (delta 0), reused 0 (delta 0)
To bitbucket.org:user_name/project_name.git
- [deleted] fealure/CPT-270-old_name
* [new branch] feature/CPT-270-new_name -> feature/CPT-270-new_name
```
3. Go to BB on previously created pull request and:
a. see old branch name in source side


b. click on target branch and get previously created branch name, click on link and get 404 not found page.